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NEETChemistryd and f Block Elements

Identify the incorrect statement regarding manganate and permanganate ions.

Options

  1. AManganate ion is green in colour and is paramagnetic.
  2. BManganate ion has a tetrahedral geometry while permanganate ion has a square planar geometry.
  3. CPermanganate ion is purple in colour and is diamagnetic.
  4. DThe oxidation state of manganese is +6 in manganate ion and +7 in permanganate ion.

Correct answer

B. Manganate ion has a tetrahedral geometry while permanganate ion has a square planar geometry.

Step-by-step solution

The manganate ( MnO ₄²⁻ ) and permanganate ( MnO ₄⁻ ) ions both have a tetrahedral geometry. The statement claiming permanganate has a square planar geometry is incorrect. Manganate ion has manganese in the +6 oxidation state ( d^1 configuration), making it green and paramagnetic. Permanganate ion has manganese in the +7 oxidation state ( d^0 configuration), making it purple and diamagnetic. Answer: Manganate ion has a tetrahedral geometry while permanganate ion has a square planar geometry.

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